<?php
    // +----------------------------------------------------------------------
    // | ThinkPHP [ WE CAN DO IT JUST THINK ]
    // +----------------------------------------------------------------------
    // | Copyright (c) 2006~2015 http://thinkphp.cn All rights reserved.
    // +----------------------------------------------------------------------
    // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
    // +----------------------------------------------------------------------
    // | Author: yunwuxin <448901948@qq.com>
    // +----------------------------------------------------------------------
    namespace think\process;

    use think\Process;

    class Builder {
        private $arguments;
        private $cwd;
        private $env            = null;
        private $input;
        private $timeout        = 60;
        private $options        = [];
        private $inheritEnv     = true;
        private $prefix         = [];
        private $outputDisabled = false;

        /**
         * 构造方法
         * @param string[] $arguments 参数
         */
        public function __construct(array $arguments = []) {
            $this->arguments = $arguments;
        }

        /**
         * 创建一个实例
         * @param string[] $arguments 参数
         * @return self
         */
        public static function create(array $arguments = []) {
            return new static($arguments);
        }

        /**
         * 添加一个参数
         * @param string $argument 参数
         * @return self
         */
        public function add($argument) {
            $this->arguments[] = $argument;
            return $this;
        }

        /**
         * 添加一个前缀
         * @param string|array $prefix
         * @return self
         */
        public function setPrefix($prefix) {
            $this->prefix = is_array($prefix) ? $prefix : [$prefix];
            return $this;
        }

        /**
         * 设置参数
         * @param string[] $arguments
         * @return  self
         */
        public function setArguments(array $arguments) {
            $this->arguments = $arguments;
            return $this;
        }

        /**
         * 设置工作目录
         * @param null|string $cwd
         * @return  self
         */
        public function setWorkingDirectory($cwd) {
            $this->cwd = $cwd;
            return $this;
        }

        /**
         * 是否初始化环境变量
         * @param bool $inheritEnv
         * @return self
         */
        public function inheritEnvironmentVariables($inheritEnv = true) {
            $this->inheritEnv = $inheritEnv;
            return $this;
        }

        /**
         * 设置环境变量
         * @param string      $name
         * @param null|string $value
         * @return self
         */
        public function setEnv($name, $value) {
            $this->env[$name] = $value;
            return $this;
        }

        /**
         *  添加环境变量
         * @param array $variables
         * @return self
         */
        public function addEnvironmentVariables(array $variables) {
            $this->env = array_replace($this->env, $variables);
            return $this;
        }

        /**
         * 设置输入
         * @param mixed $input
         * @return self
         */
        public function setInput($input) {
            $this->input = Utils::validateInput(sprintf('%s::%s', __CLASS__, __FUNCTION__), $input);
            return $this;
        }

        /**
         * 设置超时时间
         * @param float|null $timeout
         * @return self
         */
        public function setTimeout($timeout) {
            if (null === $timeout) {
                $this->timeout = null;
                return $this;
            }
            $timeout = (float)$timeout;
            if ($timeout < 0) {
                throw new \InvalidArgumentException('The timeout value must be a valid positive integer or float number.');
            }
            $this->timeout = $timeout;
            return $this;
        }

        /**
         * 设置proc_open选项
         * @param string $name
         * @param string $value
         * @return self
         */
        public function setOption($name, $value) {
            $this->options[$name] = $value;
            return $this;
        }

        /**
         * 禁止输出
         * @return self
         */
        public function disableOutput() {
            $this->outputDisabled = true;
            return $this;
        }

        /**
         * 开启输出
         * @return self
         */
        public function enableOutput() {
            $this->outputDisabled = false;
            return $this;
        }

        /**
         * 创建一个Process实例
         * @return Process
         */
        public function getProcess() {
            if (0 === count($this->prefix) && 0 === count($this->arguments)) {
                throw new \LogicException('You must add() command arguments before calling getProcess().');
            }
            $options   = $this->options;
            $arguments = array_merge($this->prefix, $this->arguments);
            $script    = implode(' ', array_map([
                                                    __NAMESPACE__ . '\\Utils',
                                                    'escapeArgument'
                                                ], $arguments
                                    )
            );
            if ($this->inheritEnv) {
                // include $_ENV for BC purposes
                $env = array_replace($_ENV, $_SERVER, $this->env);
            } else {
                $env = $this->env;
            }
            $process = new Process($script, $this->cwd, $env, $this->input, $this->timeout, $options);
            if ($this->outputDisabled) {
                $process->disableOutput();
            }
            return $process;
        }
    }
